{"title":"Thermodynamics property and structure evolution of the TiO2-containing molten slag with different CaO/SiO2 ratio and TiO2 content","authors":"","doi":"10.1016/j.ceramint.2024.07.063","DOIUrl":null,"url":null,"abstract":"<div><p>The influences of temperature and compositions (TiO<sub>2</sub> and CaO/SiO<sub>2</sub>) on thermodynamics properties and structural evolutions of TiO<sub>2</sub>-CaO-Al<sub>2</sub>O<sub>3</sub>-MgO-SiO<sub>2</sub><span> slags were investigated in this work. The slag viscosities increased with decreasing the temperature and declined with adding TiO</span><sub>2</sub>. With the raising of CaO/SiO<sub>2</sub><span> ratio, the viscosity<span> decreased under high temperatures, while it increased with the temperature further decreased lower than 1420 °C. The enthalpy change of the slag increased with raising the temperature as well as the TiO</span></span><sub>2</sub> content and reduced with the CaO/SiO<sub>2</sub><span> ratio increasing. Both the liquidus temperature<span> and break point temperature of the slags decreased with adding TiO</span></span><sub>2</sub> and increased with raising the CaO/SiO<sub>2</sub> ratio. Temperature had a significant effect on slag structure evolutions, which decreased the slag polymerization degree. With adding TiO<sub>2</sub> and CaO/SiO<sub>2</sub> ratio in slags, the slag structure stability was weakened by increasing the amount of simpler silicate and TiO<sub>6</sub> units and reducing the proportion of complex Ti-O units. Both the temperature and compositions (TiO<sub>2</sub> and CaO/SiO<sub>2</sub>) depolymerized the slag structure to decline the viscosity.</p></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":null,"pages":null},"PeriodicalIF":5.1000,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884224029432","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
引用次数: 0
Abstract
The influences of temperature and compositions (TiO2 and CaO/SiO2) on thermodynamics properties and structural evolutions of TiO2-CaO-Al2O3-MgO-SiO2 slags were investigated in this work. The slag viscosities increased with decreasing the temperature and declined with adding TiO2. With the raising of CaO/SiO2 ratio, the viscosity decreased under high temperatures, while it increased with the temperature further decreased lower than 1420 °C. The enthalpy change of the slag increased with raising the temperature as well as the TiO2 content and reduced with the CaO/SiO2 ratio increasing. Both the liquidus temperature and break point temperature of the slags decreased with adding TiO2 and increased with raising the CaO/SiO2 ratio. Temperature had a significant effect on slag structure evolutions, which decreased the slag polymerization degree. With adding TiO2 and CaO/SiO2 ratio in slags, the slag structure stability was weakened by increasing the amount of simpler silicate and TiO6 units and reducing the proportion of complex Ti-O units. Both the temperature and compositions (TiO2 and CaO/SiO2) depolymerized the slag structure to decline the viscosity.
期刊介绍:
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.